Load Routes into Navigon for Android?

I've combed the internets, but I have not been able to find the solution to this problem. I see that it is possible, through a process of file conversion and saving to hidden folders, to upload GPX files as RTE files within Navigon for iPhone. In theory, that same functionality has to be hidden somewhere in there for the Android version, right?

Navigon on Android uses a SQLite database, i.s.o. files like on the iPhone. I've tried to add routes to the database, but somehow Navigon detects that I've been fooling with the database and quits working. Anyone any idea what check is being used?